Iron ore is the primary raw material for steel production, and steel is one of the core materials for modern industry and infrastructure development. China is the world's largest steel producer and has a significant demand for iron ore. Based on the natural types of ore and ore processing technological properties, ores are classified into three types according to the TFe/FeO ratio. Among them, magnetite ore (TFe/FeO ≤ 3.5): steel-gray to dark gray, granular in texture, with massive, banded, spotted, or disseminated structures.